CN104001915A - Equipment for manufacturing large-size metal part in high energy beam additive manufacturing mode and control method of equipment - Google Patents

Equipment for manufacturing large-size metal part in high energy beam additive manufacturing mode and control method of equipment Download PDF

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Publication number
CN104001915A
CN104001915A CN201410218654.1A CN201410218654A CN104001915A CN 104001915 A CN104001915 A CN 104001915A CN 201410218654 A CN201410218654 A CN 201410218654A CN 104001915 A CN104001915 A CN 104001915A
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powder
energy
laying
spreader
sweep generator
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CN104001915B (en
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曾晓雁
魏恺文
王泽敏
王福德
朱海红
李祥友
蒋明
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SHANGHAI TECHGIIELASER TECHNOLOGY Co.,Ltd.
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Huazhong University of Science and Technology
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses equipment for manufacturing a large-size metal part in a high energy beam additive manufacturing mode and a control method of the equipment. The equipment comprises a work cavity, a worktable, a control system, a high energy beam scanning generator, a powder storage hopper, a powder laying device and a gas purification module, wherein the worktable is composed of a forming cylinder and a powder recycling cylinder, and the upper surface of the forming cylinder and the upper surface of the powder recycling cylinder are coplanar and form a work plane. The control system controls the high energy beam scanning generator and the powder laying device to move opposite to the worktable in the powder laying direction. The equipment for manufacturing the large-size metal part in the high energy beam additive manufacturing mode and the control method of the equipment largely shorten the waiting time caused by pre-installation of a powder bed when a common laser/electron beam selective melting technology is used for processing a part, thereby obviously improving the forming efficiency of high energy beam additive manufacturing. Through the application of the equipment for manufacturing the large-size metal part in the high energy beam additive manufacturing mode and the control method of the equipment, a metal part with a meter-grade size, high performance, high accuracy and a complex structure can be manufactured efficiently and rapidly.

Description

A kind of high energy beam increases equipment and the control method thereof of material manufacture large scale metallic element
Technical field
The invention belongs to high energy beam processing technique field, be specifically related to a kind of equipment and control method thereof of high energy beam increasing material manufacture large scale metallic element.The present invention is the increasing material manufacturing technology being synchronized with the movement based on high energy beam sweep generator and Powder spreader, and the high efficiency that is particularly useful for large-size and high performance, high accuracy and labyrinth metallic element is shaped.
Background technology
Increasing material manufacturing technology, claim again three-dimensional printing technology (3D-Printing), is a kind of emerging manufacturing technology.Be different from traditional waiting material manufacture (casting, forging, welding) and subtract material manufacture (machined), increase material manufacturing technology based on discrete-accumulation rule, according to the three-dimensional data of parts, pattern with layering stack links together material, until complete the shaping of whole part, the feature with high flexible, personalization is current manufacturing frontier development.According to the difference of raw material, the manufacture of increasing material can be divided into rapid prototyping manufacture (Rapid Prototyping-RP) and the near-net-shape (Rapid Manufacturing-RM) of the parts that can directly come into operation.RP technique, taking nonmetallic materials such as liquid resin, paraffin, paper and silk materials as raw material, is manufactured prototype exemplar and the model of non-densification, is usually used in design optimization, Product evaluation and publicity.By contrast, taking metal dust or silk material as the parts near-net-shape technology that can directly come into operation of raw material, can directly complete the quick manufacture of various shaped pieces, load-carrying member, there is higher using value.
The process of near-net-shape has a variety of, such as, according to adopted energy source (laser beam, electron beam, ion beam, electric arc etc.) different with the mode of material category and interpolation material, can be subdivided into again many types.Current, in the 3D of metallic element printing-forming technique, be shaped with laser beam, electron beam (below both being generically and collectively referred to as to " high energy beam ") with fastest developing speed, also industrial quarters is accepted the most.According to the difference of raw metal supply mode, use maximum increasing material manufacturing technologies to comprise: the direct manufacturing technology of Laser Melting Deposition (the Laser Melting Deposition based on synchronous powder feeding system, hereinafter to be referred as LMD technology), electron beam fuse based on automatic feeding increases material manufacturing technology (Electron Beam Wire Melting, hereinafter to be referred as EBWM technology), the laser selective melting of laying based on powder bed increases material manufacturing technology (Selective Laser Melting, hereinafter to be referred as SLM technology) and electron beam selective melting increasing material manufacturing technology (Electron Beam Selective Melting, hereinafter to be referred as EBSM technology).
Laser beam or beam power that LMD and EBWM technology adopt are very high, spot diameter (or beam spot diameter) is large, deposition efficiency is high, particularly adopt heavy duty machine tools as motion, therefore be applicable to shaping large scale hardware, but be difficult to realize the Precision Machining of complex component.
The mode that SLM and EBSM technology are laid based on powder bed, its process can be summarized as follows: first utilize paving powder system to lay one deck at substrate surface and have certain thickness powder, laser beam or electron beam carry out selective melting according to default track to powder bed subsequently, and cooling, solidify formation sedimentary deposit; By the substrate decline height identical with deposit thickness, again lay powder bed selective melting, until complete the shaping of whole parts.SLM and EBSM technology generally adopt laser instrument that power is lower or electron gun as energy source, and its focal beam spot or beam spot diameter are less, are generally 0.1~0.2mm.In process, high energy beam is only rapid scanning on the bisque of 0.02~0.2mm at thickness, forms small molten bath and solidifies rapidly, and heat accumulation is little, and parts precision and surface quality are high.Therefore, SLM and EBSM technology are particularly suitable for the manufacture of complicated shape metal parts.
But the maximum deficiency that SLM and EBSM technology exist is that its forming efficiency is low.Because low, the hot spot of high energy beam power or the beam spot diameter that adopt are little, its forming efficiency is starkly lower than LMD and EBWM technology, is manufacturing large scale parts overlong time.Therefore the forming efficiency that, further improves SLM and EBSM technology becomes the task of top priority of this technology of development.
At present, existing some relating to, is improved the method for SLM/EBSM working (machining) efficiency and the patent of relevant device is open.Domestic patent documentation " for multiple laser scanning system and the method for laser fast forming process equipment " (publication number is CN103358555A) discloses a kind of method and apparatus that can be used for improving SLM efficiency.This equipment utilization laser beam splitter, is divided into a branch of the first laser and a branch of the second laser by initial laser beam.Equipment comprises the first scanning element and the second scanning element, the first scanning element and the second scanning element under the control of control signal, adjust respectively the first laser and the second laser scans according to default track simultaneously, thereby improved to a certain extent SLM working (machining) efficiency.But owing to adopting the method for beam splitting, the power of the first laser and the second laser, lower than initial laser beam, for ensureing the abundant fusing of powder, certainly will will reduce lift height or reduce sweep speed, thereby greatly having limited the room for promotion of SLM working (machining) efficiency.
Domestic patent documentation " precinct laser fusion building mortion and the method for medical magnesium alloy metal part " (publication number: CN101856724A) discloses a kind of SLM equipment equally.This equipment comprises control device, powder sending and laying device, laser transmission mechanism, gas cleaning plant and sealing working chamber, the paving that wherein powder sending and laying device comprises hopper and is installed on both sides, hopper below is whitewashed, the corresponding setting of feeding port above hopper top and working chamber, the below that paving is whitewashed is corresponding with the upper surface level of formation cylinder, in the hopper of powder sending and laying device, is provided with heater strip.Before metal dust is preset to formation cylinder substrate, utilize this heater strip by its preheating in advance, improve the absorptivity of metal dust to laser energy.Under same laser energy input condition, can obtain higher forming efficiency.But this equipment adopts " unidirectional paving powder " mode, preset one deck powder needs powder sending and laying device back and forth movement one week in working chamber, and the non-productive work time is too much, has hindered equally the remarkable lifting of SLM working (machining) efficiency.
Domestic patent documentation " a kind of electron beam selective melting manufacturing process of no-welding-seam metal beehive member " (publication number: CN103273065A) discloses a kind of EBSM method, the computer that the equipment that the method adopts comprises electron beam fast forming machine and joins with electron beam fast forming machine, wherein electron beam fast forming machine comprises lifting workbench, Chu Fenxiang, Powder spreader and electron beam generator, the slicing profile data that generate according to computer, thus electron beam successively scans and obtains metal beehive member metal dust bed.The involved storage powder case of the method is symmetrically arranged in the left and right sides of working chamber, thereby realizes " two-way powder laying ", has improved the efficiency of EBSM processing metal honeycomb structure.But in above-mentioned patent, this step of high energy beam scanning deposition must be treated can carry out after powder bed is laid, the stand-by period that paving powder operation causes is longer.
Except published Patents, EOS Corp. of Germany has released the SLM equipment of model for " EOS M400 " in the recent period, and equipment adopts " two-way powder laying " structure, can realize the high efficiency manufacture of metallic element.Germany Fraunhofer laser technology Research Institute goes out the SLM equipment that a kind of spot diameter can regulate continuously.In the time of shaping large scale parts, adopt the laser beam flying deposition part core of high power, large spot, adopt the laser beam flying deposition part shell of low-power, small light spot simultaneously, thereby on the basis that ensures parts precision and surface quality, realized the lifting of forming efficiency.The Arcam company of Sweden develops the EBSM equipment that model is " Arcam Q-20 ", and equipment adopts " two-way powder laying " structure, can complete the processing of high-precision metal parts.
But the said equipment is in reality processing, it is independently in time that powder bed is laid with these two processes of high energy beam scanning deposition.Only have when powder is preset complete after, high energy beam just scans and forms sedimentary deposit according to default track to this layer of powder constituency.According to the difference of concrete paving powder mode (unidirectional paving powder or two-way powder laying), the time of the preset one deck powder of existing SLM/EBSM equipment is approximately 10~30s.In the time being shaped larger-size parts, Chang Gaoda is thousands of and even up to ten thousand for the deposition number of plies, because " stand-by period " that fore-put powder bed causes can, up to tens hours, seriously reduce the forming efficiency of SLM/EBSM, and limited can process component dimension limit." EOS M400 " is not only 400mmx400mmx400mm with the limit formed body integration of " Arcam Q-20 " 3with 350x380mm (Φ/H).
In sum, existing SLM/EBSM technology is not owing to can finely working in coordination with between paving powder craft process and high energy beam scanning forming process, and causing cannot be in the efficient shaping that truly realizes large scale, high-test metal parts.Therefore, inventing a kind of high energy beam that can produce efficiently large-size and high performance, high accuracy, labyrinth metallic element, to increase material manufacturing equipment significant.
Summary of the invention
For the deficiency of existing SLM/EBSM technology, the present invention proposes equipment and control method thereof that a kind of high energy beam increases material manufacture large scale metallic element, object is that the high efficiency that realizes large-size and high performance, high accuracy, labyrinth metallic element is shaped.
A kind of high energy beam provided by the invention increases the equipment of material manufacture large scale metallic element, it is characterized in that, this equipment comprises working chamber, workbench, control system and gas purification module;
Described workbench comprises the first Powder Recovery cylinder, the second Powder Recovery cylinder and formation cylinder, the first Powder Recovery cylinder and the second Powder Recovery cylinder lay respectively at formation cylinder both sides, and be all positioned at working chamber, the coplanar formation working face of upper surface of the first Powder Recovery cylinder, the second Powder Recovery cylinder and formation cylinder; Gas purification module is by air inlet and gas outlet and working chamber formation closed circulation;
This equipment also comprises high energy beam sweep generator, the first powder storage hopper, the second powder storage hopper and Powder spreader, and control system is connected and controls their collaborative works with high energy beam sweep generator, the first powder storage hopper, the second powder storage hopper, Powder spreader, workbench and gas cleaning module respectively;
High energy beam sweep generator is positioned at working chamber top, and the first powder storage hopper, the second powder storage hopper and Powder spreader are positioned at working chamber inside; The first powder storage hopper, the second powder storage hopper lay respectively at the both sides of high energy beam sweep generator, and Powder spreader is positioned at the below of the first powder storage hopper and the second powder storage hopper, to receive it for powder, and for carrying out two-way powder laying on formation cylinder surface;
Described workbench, high energy beam sweep generator, the first powder storage hopper, the second powder storage hopper and Powder spreader all can be provided with motion, make high energy beam sweep generator, Powder spreader can be synchronously and workbench occur along the relative motion of paving powder direction, and in high energy beam scanning process, the distance of high energy beam sweep generator center line and described Powder spreader keeps the radius of the effective processing overlay area that is greater than high energy beam sweep generator.
The present invention also provides several concrete improvement project and the corresponding control method thereof of technique scheme.
The present invention has following technique effect:
(1) the present invention is by controlling high energy beam sweep generator, Powder spreader synchronously and the relative motion of workbench generation edge paving powder direction, greatly shorten " stand-by period " of while adopting conventional SLM/EBSM technology process component, causing because of independent preset metal dust bed process, greatly improved high energy beam and increased the forming efficiency that material is manufactured;
(2) the present invention adopts two-way powder laying mode, has further improved the forming efficiency of laser or electron beam selective melting Quick-forming;
(3) the present invention is according to the requirement of forming quality, efficiency, both can adopt flexibly " double galvanometer combines (double beam deflector combination) or arranges galvanometer combination (arranging beam deflector combination) more more; can regulate continuously the relative velocity between high energy beam sweep generator, Powder spreader and workbench again, thereby further improves forming efficiency and the crudy of metallic element;
(4), because forming efficiency significantly improves, can apply the present invention and realize the Quick-forming of the oversize metallic element that reaches " rice " grade;
(5) because " stand-by period " of causing because of fore-put powder bed greatly shortened, parts remain higher temperature in process, because thermal cycle causes repeatedly stress, distortion and problems of crack are improved;
(6) increase in material manufacture process at high energy beam, high energy beam sweep generator both can with " flight " state of workbench relative motion under carry out constituency scanning, thereby ensure the desirable machining area of track while scan moment in high energy beam sweep generator, while avoiding being shaped large scale metallic element away from the track while scan distortion of desirable machining area position, can synchronize with Powder spreader again along paving powder direction step motion, after each mobile distance suitable with effective processing overlay area diameter, under static state complete the fusing scanning of corresponding region powder bed, under the condition of taking into account cost, further ensure precision and the surface quality of metallic element.
Brief description of the drawings
Fig. 1 is the first detailed description of the invention schematic diagram that high energy beam involved in the present invention increases material manufacture large scale metallic element equipment;
Fig. 2 is the first structural representation of scanning galvanometer group involved in the present invention;
Fig. 3 adopts the high energy beam shown in Fig. 1 to increase material manufacturing equipment to carry out in metallic element process powder bed and lay and synchronize the detailed schematic of carrying out with high energy beam scanning process;
Fig. 4 is the second detailed description of the invention schematic diagram that high energy beam involved in the present invention increases material manufacture large scale metallic element equipment;
Fig. 5 is the third detailed description of the invention schematic diagram that high energy beam involved in the present invention increases material manufacture large scale metallic element equipment;
Fig. 6 adopts the high energy beam shown in Fig. 5 to increase material manufacturing equipment to carry out in metallic element process powder bed and lay and synchronize the detailed schematic of carrying out with high energy beam scanning process;
Fig. 7 is the first structural representation of beam deflector group involved in the present invention;
Fig. 8 is double galvanometer combination (double beam deflector combination) involved in the present invention or arranges the structural representation of galvanometer combination (arranging beam deflector combination) more more;
Fig. 9 is the schematic diagram of relative velocity method between a kind of continuous adjusting high energy beam sweep generator involved in the present invention and workbench.
Figure 10 is a kind of step-by-step movement high energy beam scanning process schematic diagram involved in the present invention.
Detailed description of the invention
Below by by embodiment and accompanying drawing, the present invention being described in further detail, but the following example and accompanying drawing are only illustrative, and protection scope of the present invention is not subject to the restriction of these embodiment.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
Embodiment 1
As shown in Figure 1, the first detailed description of the invention of high energy beam increasing material manufacturing equipment involved in the present invention comprises powder feeding and scan module 1, working chamber 9, workbench, control system 10 and gas purification module 11.
Control system 10 calculating processing tracks also generate relevant digital control signal, and this digital control signal is for the powder feeding that regulates and controls to be connected with control system 10 and the collaborative work of scan module 1, workbench and gas cleaning module 11.For graphic simplicity, in Fig. 1, only show being connected of powder feeding and scan module 1 and control system 10, remaining part does not show with the connection of control system 10.It should be noted that this connection both can connect including the contact physical circuit etc., can be also the untouchable links such as electronic signal.
Powder feeding and scan module 1 are made up of scanning galvanometer group 2, the first powder storage hopper 3, the second powder storage hopper 4, the first unidirectional Powder spreader 5 and the second unidirectional Powder spreader 6.Wherein, scanning galvanometer group 2 is positioned at working chamber 9 tops, and provides energy as high energy beam sweep generator for high energy beam increases material manufacture.The first powder storage hopper 3, the second powder storage hopper 4, the first unidirectional Powder spreader 5 and the second 6 of unidirectional Powder spreaders are positioned at working chamber 9 inside, and the first powder storage hopper 3, the second powder storage hopper 4 and the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 distribute as reference is mirror image taking the center line of scanning galvanometer group 2 respectively.Powder feeding and scan module 1 are connected with the mechanism such as such as high accuracy screw mandrel, slide block, guide rail, to ensure that the inner each parts of powder feeding and scan module 1 can be with identical speed along paving powder direction cooperative motion.The first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 lay respectively under the first powder storage hopper 3, the second powder storage hopper 4, to receive it for powder, and for carrying out two-way powder laying on formation cylinder 16 surfaces;
As shown in Fig. 2 (a), scanning galvanometer group 2 is by n the galvanometer system 18 being arranged in a linear perpendicular to paving powder direction 1, 18 2..., 18 ncomposition.Each galvanometer system is along being 1 perpendicular to effective processing covering diameter of paving powder direction, and the quantity n of galvanometer system should equate perpendicular to the size L of paving powder direction with formation cylinder 16 with 1 product, meet n*1=L.
As shown in Fig. 2 (b), galvanometer system 18 includes the scanning galvanometer 20, light-conducting system 21, lasing light emitter 22, f-θ compound lens 23 and the protective glass 24 that are arranged in dust cover 19; Lasing light emitter 22 can adopt and comprise optical fiber laser, Nd:YAG laser instrument and CO 2laser instrument is at interior middle superpower laser.Laser beam, after lasing light emitter 22 sends, enters light-conducting system 21 and completes corresponding collimation, expands processing, enters afterwards scanning galvanometer 20.The machining locus guiding laser beam that scanning galvanometer 20 generates according to control system 10 carries out corresponding deflection; laser beam after deflection focuses on via f-θ compound lens 23 again; the final protective glass 24 that passes arrives moulding cylinder upper surface; and according to the control system graph data providing of cutting into slices; selective scanning powder bed, realizes the shaping of metal parts.
Workbench is made up of the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16, and in the inner also transfixion of working chamber 9.It should be noted that, defined " static " state refers to the absolute rest of workbench along paving powder direction here.The first Powder Recovery cylinder 7 and the second Powder Recovery cylinder 8 lay respectively at formation cylinder 16 both sides.The upper surface of the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16 is coplanar, and then form working face, the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 lower ends are parallel with working face, and retain a working clearance and be convenient to powder and flow out and strike off.Formation cylinder 16 is respectively forming board 14, heating system 15 and elevating mechanism 17 from top to bottom.Heating system 15 is for preheating forming board 14.Under the drive of elevating mechanism 17, the forming board 14 of formation cylinder 16 inside and heating system 15 can be along institute's process component short transverse high-precision motion, and elevating mechanism 17 can be made up of location structures such as high accuracy screw mandrels.
Gas purification module 11 forms closed circulation by air inlet and gas outlet and working chamber 9.Before the manufacture of high energy beam increasing material starts, gas purification module 11 is filled with a certain amount of nitrogen, the argon gas of comprising in interior inert protective gas to working chamber 9 inside, make working chamber 9 internal water, oxygen content meet job requirement.
Increase material manufacturing equipment based on the high energy beam shown in Fig. 1, the first control method that high energy beam increasing material involved in the present invention is manufactured large-scale metallic element is as follows:
(1) powder feeding and scan module 1 are placed in to working face upper left side, wherein the second unidirectional Powder spreader 6 lower ends are placed between the first Powder Recovery cylinder 7 and formation cylinder 16.According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulates the single flow of the second powder storage hopper 4, is the disposable metal dust that meets the required weight of single berth powder that provides of the second unidirectional Powder spreader 6;
(2) powder feeding and scan module 1 at the uniform velocity move right with a certain speed V along paving powder direction.The second unidirectional Powder spreader 6 moves to the metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T; Now as shown in Figure 3, the second unidirectional Powder spreader 6 has been laid layer of metal powder 25 in its left side, and this layer of powder can be positioned at and deposit part 12 or powder bed 13 tops.Powder feeding and scan module 1 continue at the uniform velocity to move right with speed V along paving powder direction, and drive effective processing overlay area 26 of scanning galvanometer group 2 to move right in the lump, until planning scanning filling path enters 26 inside, effective processing overlay area.Now, scanning galvanometer group 2 is carried out selective melting deposition for new layer of metal powder 25.
It should be noted that: the first, the distance S of scanning galvanometer group 2 center lines and the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 should be greater than the effectively radius of processing overlay area 26 of scanning galvanometer group 2, is independent of each other to ensure that powder bed is laid with laser scanning process; The second, because scanning galvanometer group 2 is worked under " flight " state, for ensureing powder smelting and avoiding track while scan distortion, control system 10 need be carried out the motion compensation of mating with speed V to the track while scan of scanning galvanometer group 2; The 3rd, the movement velocity V of powder feeding and scan module 1 needs to be regulated in conjunction with effectively processing overlay area 26 inner scanning filling areas, to ensure that track while scan is positioned at effectively processing 26 inside, overlay area of scanning galvanometer group 2 all the time;
(3) powder feeding and scan module 1 continue at the uniform velocity to move right with speed V along paving powder direction, and by laser beam, it are carried out to selective melting deposition in laying metal powder layer.Afterwards, powder feeding and scan module 1 sail out of formation cylinder 16 surfaces, and the laying of metal powder layer 25 and selective melting deposition finish;
(4) powder feeding and scan module 1 continue at the uniform velocity to move right with speed V along paving powder direction, and the second unidirectional Powder spreader 6 may be sent into the second Powder Recovery cylinder 8 by remaining metal dust;
(5) powder feeding and scan module 1 continue at the uniform velocity to move right with speed V along paving powder direction, until the first unidirectional Powder spreader 5 lower ends move between the second Powder Recovery cylinder 8 and formation cylinder 16.After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper 3, is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader 5; The forming board 14 decline distance identical with deposit thickness T;
(6) powder feeding and scan module 1 edge paving powder direction are with speed V at the uniform velocity to left movement, and the first unidirectional Powder spreader 5 moves to behind formation cylinder 16 surfaces, starts the new layer of metal powder that is T at formation cylinder 16 surface uniform laying depths.Powder feeding and scan module 1 continues along paving powder direction with speed V at the uniform velocity to left movement, and by laser beam, it carried out to selective melting deposition in laying new layer of metal powder.Afterwards, powder feeding and scan module 1 sail out of formation cylinder 16 surfaces, and new layer of metal powder is laid and selective melting deposition finishes.Powder feeding and scan module 1 continuation edge paving powder direction are with speed V at the uniform velocity to left movement, and the first unidirectional Powder spreader 5 may be sent into the first Powder Recovery cylinder 7 by remaining metal dust.Powder feeding and scan module 1 continues along paving powder direction with speed V at the uniform velocity to left movement, until the second unidirectional Powder spreader 6 lower ends move between the first Powder Recovery cylinder 7 and formation cylinder 16.The forming board 14 decline distance identical with deposit thickness T;
(7) repeating step (1)~(6), until complete the final shaping of metallic element.
Embodiment 2
Increase at high energy beam involved in the present invention on the basis of the first detailed description of the invention of material manufacturing equipment and improved, can obtain high energy beam involved in the present invention and increase the second detailed description of the invention of material manufacturing equipment, as shown in Figure 4.In this embodiment, powder feeding and scan module 1 are still made up of scanning galvanometer group 2, the first powder storage hopper 3, the second powder storage hopper 4, the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6, and the arrangement mode between the inner each parts of powder feeding and scan module 1 is also consistent with the first detailed description of the invention of high energy beam increasing material manufacturing equipment.Difference is, scanning galvanometer group 2 and the first powder storage hopper 3, the second powder storage hopper 4, the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 are individually fixed in working chamber 9 inside and outside both sides, top, middle part transfixions, it should be noted that, defined " static " state refers to that powder feeding and scan module 1 are along the absolute rest that spreads powder direction here.
Workbench is still made up of jointly the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16, and the arrangement mode of the each parts of workbench is also consistent with the first detailed description of the invention of high energy beam increasing material manufacturing equipment.Difference is, by thereunder installing table transmission mechanism 28 and table transmission mechanism power source 29 additional, workbench is improved to moving bolster 27.Wherein, table transmission mechanism 28 can be made up of high accuracy detent mechanisms such as high accuracy screw mandrel, high precision belt wheels, the motion for table transmission mechanism 28 of 29 of table transmission mechanism power sources provides driving force, and drives moving bolster 27 to move along paving powder direction high-precision reciprocatings.The first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 lower ends are still parallel with the working face that the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16 upper surfaces form, and retain a working clearance and be convenient to powder and flow out and strike off.
The arrangement mode of control system 10 and gas purification module 11 is still consistent with the first detailed description of the invention of high energy beam increasing material manufacturing equipment.Difference is, control system 10 regulates and controls the collaborative work of powder feeding and scan module 1, moving bolster 27, workbench transmission mechanism power source 29, workbench transmission mechanism 28 and gas purification module 11 simultaneously.
Increase material manufacturing equipment based on the high energy beam shown in Fig. 4, the second control method that high energy beam increasing material involved in the present invention is manufactured large-scale metallic element is as follows:
(1) moving bolster 27 is placed in to powder feeding and scan module 1 lower right, wherein the second unidirectional Powder spreader 6 lower ends should be between the first Powder Recovery cylinder 7 and formation cylinder 16.According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulates the single flow of the second powder storage hopper 4, is the disposable metal dust that meets the required weight of single berth powder that provides of the second unidirectional Powder spreader 6;
(2) moving bolster 27 edge paving powder directions are with a certain speed V at the uniform velocity to left movement, and formation cylinder 16 moves to behind the second unidirectional Powder spreader 6 belows, the metal powder layer that it is T that the second unidirectional Powder spreader 6 starts at formation cylinder 16 surface uniform laying depths; Moving bolster 27 continues along paving powder directions with speed V at the uniform velocity to left movement, until planning scanning filling path enters effectively processing 26 inside, overlay area of scanning galvanometer group 2, now scanning galvanometer group 2 is carried out selective melting deposition for the metal powder layer of having laid.It should be noted that: the first, the distance S of scanning galvanometer group 2 center lines and the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 should be greater than the effectively radius of processing overlay area 26 of scanning galvanometer group 2, is independent of each other to ensure that powder bed is laid with laser scanning process; The second, because scanning galvanometer group 2 is worked under " flight " state, for ensureing powder smelting and avoiding track while scan distortion, control system 10 need be carried out the motion compensation of mating with speed V to the track while scan of scanning galvanometer group 2; The 3rd, the movement velocity V of moving bolster 27 needs to be regulated in conjunction with effectively processing overlay area 26 inner scanning filling areas, to ensure that track while scan is positioned at effectively processing 26 inside, overlay area of scanning galvanometer group 2 all the time;
(3) moving bolster 27 continues along paving powder directions with speed V at the uniform velocity to left movement, and by laser beam, it is carried out to selective melting deposition in laying metal powder layer.Afterwards, formation cylinder 16 sails out of the second unidirectional Powder spreader 6 and scanning galvanometer group 2 belows in succession, and metal powder layer is laid and selective melting deposition finishes;
(4) moving bolster 27 continuation edge paving powder directions are with speed V at the uniform velocity to left movement, and the second unidirectional Powder spreader 6 may be sent into the second Powder Recovery cylinder 8 by remaining metal dust;
(5) moving bolster 27 continues along paving powder directions with speed V at the uniform velocity to left movement, until the second Powder Recovery cylinder 8 and formation cylinder 16 lay respectively at the first unidirectional Powder spreader 5 both sides, lower end.After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper 3, is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader 5; The forming board 14 decline distance identical with deposit thickness T;
(6) moving bolster 27 at the uniform velocity moves right with speed V along paving powder direction, and formation cylinder 16 moves to behind the first unidirectional Powder spreader 5 belows, the new metal powder layer that it is T that the first unidirectional Powder spreader 5 starts at formation cylinder 16 surface uniform laying depths.Moving bolster 27 continues at the uniform velocity to move right with speed V along paving powder direction, and by laser beam, its selective melting is deposited in laying new layer of metal powder.Afterwards, formation cylinder 16 sails out of the first unidirectional Powder spreader 5 and scanning galvanometer group 2 belows, and new layer of metal powder is laid and selective melting deposition finishes.Moving bolster 27 continues at the uniform velocity to move right with speed V along paving powder direction, and the first unidirectional Powder spreader 5 may be sent into the first Powder Recovery cylinder 7 by remaining metal dust.Moving bolster 27 continues at the uniform velocity to move right with speed V along paving powder direction, until the first Powder Recovery cylinder 7 and formation cylinder 16 lay respectively at the second unidirectional Powder spreader 6 both sides, lower end.The forming board 14 decline distance identical with deposit thickness T;
(7) repeating step (1)~(6), until complete the Quick-forming of metallic element.
As increasing for above-mentioned high energy beam the improvement that material is manufactured equipment the first and the second detailed description of the invention of large-scale metallic element, in order further to improve forming efficiency, and while avoiding individual layer powder thickness increment T larger, the obstruction of the too much metal dust in the first unidirectional Powder spreader 5 and the second unidirectional Powder spreader 6 fronts to unidirectional Powder spreader and working face relative motion, can do following improvement: as Fig. 1, shown in Fig. 4, make the first powder storage hopper 3 and the second powder storage hopper 4 in the process of powder feeding and scan module 1 and working face generation relative motion, supply with continuously respectively powder stock, the delivery rate of the first powder storage hopper 3 and the second powder storage hopper 4 can regulate according to actual conditions, can meet the even laying of specific thicknesses metal powder layer.
Embodiment 3
On the basis of equipment shown in Fig. 1, remove the first unidirectional Powder spreader 5 and the second unidirectional Powder spreader 6, and set up two-way powder laying device 30, thus high energy beam involved in the present invention formed and increase material and manufacture the third detailed description of the invention of large-scale metallic element, as shown in Figure 5.
Workbench is still made up of the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16, and static in the inner maintenance of working chamber 9.It should be noted that, defined " static " state refers to the absolute rest of the inner each parts of workbench along paving powder direction here.The first Powder Recovery cylinder 7 and the second Powder Recovery cylinder 8 still lay respectively at formation cylinder 16 both sides.The upper surface of the first Powder Recovery cylinder 7, the second Powder Recovery cylinder 8 and formation cylinder 16 is still coplanar, and forms working face.The first powder storage hopper 3, the second powder storage hopper 4 are positioned at working face top and are fixed on working chamber 9 inside, and the first powder storage hopper 3 lower ends are between the first Powder Recovery cylinder 7 and formation cylinder 16, and the second powder storage hopper 4 lower ends are between the second Powder Recovery cylinder 8 and formation cylinder 16.Two-way powder laying device 30 is positioned at the first powder storage hopper 3, the second powder storage hopper 4 belows, to receive it for powder, and for carrying out two-way powder laying on formation cylinder 16 surfaces.Two-way powder laying device 30 lower ends are parallel with working face, and retain a working clearance and be convenient to powder and flow out and strike off.Under the structures such as high accuracy screw mandrel, slide block are auxiliary, two-way powder laying device 30 can move back and forth along paving powder direction.
Scanning galvanometer group 2 is positioned at working chamber 9 tops, also can be auxiliary lower to the reciprocating motion of paving powder direction in structures such as high accuracy screw mandrel, slide blocks.The arrangement mode of control system 10 and gas purification module 11 is still consistent with the first detailed description of the invention of high energy beam increasing material manufacturing equipment.Control system 10 is for regulating and controlling scanning galvanometer group 2, two-way powder laying device 30, the first powder storage hopper 3, the second powder storage hopper 4, workbench and 11 collaborative works of gas purification module.
The control method that the third detailed description of the invention that uses high energy beam to increase material manufacturing equipment is manufactured large scale metallic element method is:
(1) two-way powder laying device 30 is placed in to the first powder storage hopper 3 belows, according to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulate the single flow of the first powder storage hopper 3, the metal dust that meets the required weight of single berth powder is provided for two-way powder laying device 30 is disposable;
(2) two-way powder laying device 30 at the uniform velocity moves right with a certain speed V along paving powder directions, moves to the metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T; Two-way powder laying device 30 moves sometime after t, and scanning galvanometer group 2, from two-way powder laying device 30 upper left sides, starts at the uniform velocity to move right along paving powder direction with same speed V.Now as shown in Figure 6, two-way powder laying device 30 has laid in its left side the metal powder layer 25 that a layer thickness is T, and this layer of powder can be positioned at and deposit part 12 tops, also can be positioned at powder bed 13 tops.Two-way powder laying device 30 continues to move right with speed V along paving powder direction with scanning galvanometer group 2, and drive effective processing overlay area 26 of scanning galvanometer group 2 to move right in the lump, until planning scanning filling path enters 26 inside, effective processing overlay area, now scanning galvanometer group 2 is carried out selective melting deposition for metal powder layer 25.It should be noted that: the first, when scanning, the distance S of scanning galvanometer group 2 center lines and two-way powder laying device 30 should keep being greater than the effectively radius of processing overlay area 26 of scanning galvanometer group 2, is independent of each other to ensure that powder bed is laid with laser scanning process; The second, because scanning galvanometer group 2 is worked under " flight " state, for ensureing powder smelting and avoiding track while scan distortion, control system 10 need be carried out the motion compensation of mating with speed V to the track while scan of scanning galvanometer group 2; The 3rd, two-way powder laying device 30 needs to be regulated in conjunction with concrete scanning filling area with the movement velocity V of scanning galvanometer group 2, to ensure that track while scan is positioned at effectively processing 26 inside, overlay area of scanning galvanometer group 22 all the time;
(3) two-way powder laying device 30 continues at the uniform velocity to move right with speed V along paving powder direction with scanning galvanometer group 2, and by laser beam, its selective melting is deposited in laying metal powder layer 25.Afterwards, two-way powder laying device 30 sails out of formation cylinder 16 surfaces in succession with scanning galvanometer group 2, and the laying of metal powder layer 25 and selective melting deposition finish;
(4) 2 motions of scanning galvanometer group stop, and two-way powder laying device 30 continues at the uniform velocity to move right with speed V along paving powder direction, and may send into the second Powder Recovery cylinder 8 by remaining metal dust;
(5) two-way powder laying device 30 moves to the second powder storage hopper 4 belows along paving powder direction at the uniform velocity left with speed V, according to increasing individual layer powder thickness increment T in manufacture process process, regulate the single flow of the second powder storage hopper 4, the metal dust that meets the required weight of single berth powder is provided for two-way powder laying device 30 is disposable; The forming board 14 decline distance identical with deposit thickness T;
(6) two-way powder laying device 30 along paving powder directions with speed V at the uniform velocity to left movement, and moving to the new metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T.Two-way powder laying device 30 moves sometime after t, and scanning galvanometer group 2 is from two-way powder laying device 30 upper right side, start along paving powder direction with same speed V at the uniform velocity to left movement, and when two-way powder laying device 30 is laid new layer of metal powder to its selective melting deposition.Afterwards, two-way powder laying device 30 sails out of formation cylinder 16 surfaces in succession with scanning galvanometer group 2, and new layer of metal powder is laid and selective melting deposition finishes.Scanning galvanometer group 2 motion stops, and two-way powder laying device 30 continues along paving powder directions with speed V at the uniform velocity to left movement, and may send into the first Powder Recovery cylinder 7 by remaining metal dust.The forming board 14 decline distance identical with deposit thickness T;
(7) repeating step (1)~(6), until complete the Quick-forming of metallic element.
The high energy beam that embodiment 1 to 3 adopts is laser beam.If the high energy beam adopting is not laser beam but electron beam, the scanning galvanometer group 2 in the related equipment of above-described embodiment substitutes the beam deflector group 31 by with magnetic field, and provides energy as high energy beam sweep generator for high energy beam increases material manufacture.As shown in Figure 7, beam deflector group 31 is by m the magnetic deflection system 33 being arranged in a linear perpendicular to paving powder direction 1, 33 2..., 33 mcomposition.Magnetic deflection system 33 is made up of magnetic deflection arrangement and electron gun.Each magnetic deflection system is along being k perpendicular to effective processing covering diameter of paving powder direction, and the quantity m of magnetic deflection system should equate perpendicular to the size L of paving powder direction with formation cylinder 16 with the product of k, meet m*k=L.While adopting electron beam as machining energy source, gas purification module 11 still forms confined space with working chamber 9, and increase before material manufacture starts and vacuumize processing for working chamber 9 inside at high energy beam, so that working chamber 9 internal vacuums meet electron beam job requirement.
Provide the embodiment of another structure of the central high energy beam sweep generator of above-described embodiment below.
As shown in Figure 8, high energy beam sweep generator is still made up of a series of galvanometer systems 18 (magnetic deflection system 33), and wherein the structure of galvanometer system 18 (magnetic deflection system 33) is identical with previous embodiment.Galvanometer system (magnetic deflection system ) be arranged in a linear perpendicular to paving powder direction, and form the 1st row energy source.Galvanometer system (magnetic deflection system ) be arranged in a linear perpendicular to paving powder direction, and form the 2nd row energy source.The 2nd row energy source is placed in the 1st row energy source right side, and jointly forms double scanning galvanometer group 2 (double beam deflector group 31) with the 1st row energy source.For each row energy source, the quantity h of galvanometer system 18 (magnetic deflection system 33) should equate perpendicular to the size L of paving powder direction with formation cylinder 16 with its product along the effective processing covering diameter f perpendicular to paving powder direction, meet h*f=L.According to described arrangement mode, according to element size and working (machining) efficiency requirement, can also further add the 3rd row energy source and even g row energy source on the 2nd row energy source right side, thereby form many row's scanning galvanometer groups 2 (arranging beam deflector group 31) more.Apply double/when arranging high energy beam that scanning galvanometer group 2 (double/arrange beam deflector group 31) carries out large parts more more and increasing material and manufacture, be accompanied by double/arrange the relative motion of scanning galvanometer group 2 (double/arrange beam deflector group 31) and workbench, each galvanometer system more more (magnetic deflection system ) keep relatively static, and the powder bed of effectively processing separately in coverage is carried out to selective melting deposition according to planning scanning filling path simultaneously.It should be noted that: the first, the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 or two-way powder laying device 30 should meet the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 and two-way powder laying device 30 not in each galvanometer system with the double/distance of arranging scanning galvanometer group 2 (double/arrange beam deflector group 31) center line more more (magnetic deflection system ) effective processing overlay area in, be independent of each other with high energy beam scanning process to ensure that powder bed is laid; The second, when double/arrange scanning galvanometer group 2 (double/arrange beam deflector group 31) while working under " flight " state more more, for ensureing powder smelting and avoiding track while scan distortion, control system need be to galvanometer system (magnetic deflection system ) track while scan carry out the motion compensation of mating with speed V; The 3rd, double/to arrange scanning galvanometer group 2 (double/arrange beam deflector group 31) and the speed of related movement V of working face to need be regulated in conjunction with concrete scanning filling area, to ensure each galvanometer system more more (magnetic deflection system ) track while scan be positioned at all the time its effectively processing overlay area.
As supplementing above-mentioned many embodiment, increase for further improving high energy beam the forming efficiency that material is manufactured, while stating in the use high energy beam increasing material manufacturing equipment manufacture large scale metallic element involved in embodiment, can adopt the control method of relative velocity V between a kind of continuous adjusting operating platform and high energy beam sweep generator, as shown in Figure 9.
Control system is cut into slices according to metallic element cad model, obtains current machined layer scanning filling track, and this fill area can be divided into multiple regions, for example S along paving powder direction according to size 1, S 2, S 3three regions.Under condition without loss of generality, suppose that three region area magnitude relationship are S 1<S 2<S 3.According to three area filling areas and actual high energy beam sweep parameter, ensureing that track while scan is positioned at all the time high energy beam sweep generator and effectively processes under the prerequisite of coverage, can be respectively for S 1, S 2, S 3the relative velocity of different workbench and high energy beam sweep generator, i.e. V are set in three regions 1, V 2, V 3, and make V 1, V 2, V 3magnitude relationship meets V 1>V 2>V 3.
In the middle of above-mentioned all embodiment, high energy beam sweep generator all with workbench relative motion " flight " state under carry out output and the selective scanning of high energy beam, for ensureing powder smelting and avoiding track while scan distortion, control system need be carried out motion compensation to the track while scan of high energy beam sweep generator, this has obviously improved the requirement to control system data-handling capacity, thereby has improved to a certain extent the cost of high energy beam increasing material manufacturing equipment.Therefore, increase material manufacture efficiency and cost in order to take into account high energy beam, can also adopt a kind of step-by-step movement high energy beam scan method.Now, the concrete control flow based on the related high energy beam increasing material manufacturing equipment of embodiment 1,2 is as follows:
(1) powder feeding and scan module 1 are placed in to working face upper left side, wherein the second unidirectional Powder spreader 6 lower ends are placed between the first Powder Recovery cylinder 7 and formation cylinder 16.According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulates the single flow of the second powder storage hopper 4, for the second unidirectional Powder spreader 6 provides the metal dust that meets the required weight of single berth powder;
(2) powder feeding and scan module 1 move right along the relative working face of paving powder direction.The second unidirectional Powder spreader 6 relative motions are to metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T; Powder feeding and scan module 1 continue to move right along the relative working face of paving powder direction, and drive effective processing overlay area relative motion to the right in the lump of high energy beam sweep generator, stop until effectively processing after overlay area enters formation cylinder 16 tops completely.Now, as shown in Figure 10 (a), effective processing overlay area 26 left border of high energy beam sweep generator overlap with moulding cylinder 16 left border just, the first unidirectional Powder spreader 5, the second 6 of unidirectional Powder spreaders are symmetrically distributed in 26 both sides, effective processing overlay area, are independent of each other to ensure that powder bed is laid with high energy beam scanning process.High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(3) as shown in Figure 10 (b), after effectively the powder bed of processing 26 inside, overlay area has scanned, powder feeding and scan module 1 move right along the relative working face of paving powder direction again, and the effective processing overlay area 26 that drives high energy beam sweep generator stops after the relative working faces of paving powder direction move right a distance that is equivalent to effectively to process overlay area 26 diameter D, high energy beam sweep generator is again according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(4) afterwards, powder feeding and scan module 1 are according to aforementioned manner, continue to do step distance to the right along the relative working face of paving powder direction and equal an effectively step motion of processing overlay area 26 diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the powder bed of 26 inside, overlay area, until complete the scanning of all graph datas of current machined layer; Powder feeding and scan module 1 continue to move right along the relative working face of paving powder direction, and the second unidirectional Powder spreader 6 may be sent into the second Powder Recovery cylinder 8 by remaining metal dust;
(5) powder feeding and scan module 1 continue to move right along the relative working face of paving powder direction, until the first unidirectional Powder spreader 5 lower ends move between the second Powder Recovery cylinder 8 and formation cylinder 16.After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper 3, is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader 5; The forming board 14 decline distance identical with deposit thickness T;
(6) powder feeding and scan module 1 are along the relative working face of paving powder direction to left movement.The first unidirectional Powder spreader 5 moves to behind formation cylinder 16 surfaces, starts the new layer of metal powder that is T at formation cylinder 16 surface uniform laying depths.Powder feeding and scan module 1 continue along the relative working face of paving powder direction to left movement, and drive effective processing overlay area relative motion left in the lump of high energy beam sweep generator, until effective processing overlay area 26 right side boundary of high energy beam sweep generator stop after just overlapping with moulding cylinder 16 right side boundary, the first unidirectional Powder spreader 5, the second unidirectional Powder spreader 6 are still symmetrically distributed in 26 both sides, effective processing overlay area, are independent of each other to ensure that powder bed is laid with high energy beam scanning process.High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(7) powder feeding and scan module 1 continues to do step distance left along the relative working face of paving powder direction and equals an effectively step motion of processing overlay area 26 diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the powder bed of 26 inside, overlay area, until complete the scanning of all graph datas of current machined layer; Then, powder feeding and scan module 1 continue along the relative working face of paving powder direction to left movement, and the first unidirectional Powder spreader 5 may be sent into the first Powder Recovery cylinder 7 by remaining metal dust.Powder feeding and scan module 1 continue along the relative working face of paving powder direction to left movement, until the second unidirectional Powder spreader 6 lower ends move between the first Powder Recovery cylinder 7 and formation cylinder 16.The forming board 14 decline distance identical with deposit thickness T;
(8) repeating step (1)~(7), until complete the final shaping of metallic element.
Adopt step-by-step movement high energy beam scan method, on the one hand, can avoid high energy beam sweep generator under " flight " state, to carry out output and the selective scanning of high energy beam, reduce equipment cost, further ensure parts precision and surface quality; On the other hand, the laying of powder bed is still synchronizeed with the motion of high energy beam sweep generator, still can greatly shorten and adopt conventional high energy beam increasing material manufacturing equipment to add " stand-by period " of causing because of fore-put powder bed man-hour, thereby ensure that high energy beam increases the efficiency that material is manufactured.Obviously, step-by-step movement high energy beam scan method also can be applicable to the related high energy beam of embodiment 3 and increases material manufacturing equipment, and now, concrete control flow is as follows:
(1) two-way powder laying device 30 is placed in to the first powder storage hopper 3 belows, according to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulate the single flow of the first powder storage hopper 3, the metal dust that meets the required weight of single berth powder is provided for two-way powder laying device 30 is disposable;
(2) two-way powder laying device 30 at the uniform velocity moves right along paving powder directions, moves to the metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T; Two-way powder laying device 30 moves sometime after t, and high energy beam sweep generator, from two-way powder laying device 30 upper left sides, starts to move right along paving powder direction with same speed, and drives effective processing overlay area 26 of high energy beam sweep generator to move right in the lump.After effective processing overlay area 26 left border overlap with moulding cylinder 16 left border just, two-way powder laying device 30 stops with the motion of high energy beam sweep generator.Two-way powder laying device 30 is positioned at 26 right sides, effective processing overlay area, is independent of each other to ensure that powder bed is laid with high energy beam scanning process.High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(3) after the powder bed of effectively processing 26 inside, overlay area has scanned, two-way powder laying device 30 and high energy beam sweep generator continue to stop after paving powder direction moves right a distance that is equivalent to effectively to process overlay area 26 diameter D with same speed, high energy beam sweep generator is again according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(4) afterwards, two-way powder laying device 30 and high energy beam sweep generator are according to aforementioned manner, continue to do step distance to the right along paving powder direction with same speed and equal an effectively step motion of processing overlay area 26 diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the powder bed of 26 inside, overlay area, until complete the scanning of all graph datas of current machined layer;
(5) motion of high energy beam sweep generator stops, and two-way powder laying device 30 continues to move right along paving powder direction, and may send into the second Powder Recovery cylinder 8 by remaining metal dust;
(6) two-way powder laying device 30 moves to the second powder storage hopper 4 belows left along paving powder direction, according to increasing individual layer powder thickness increment T in manufacture process process, regulate the single flow of the second powder storage hopper 4, the metal dust that meets the required weight of single berth powder is provided for two-way powder laying device 30 is disposable; The forming board 14 decline distance identical with deposit thickness T;
(7) two-way powder laying device 30, along paving powder directions at the uniform velocity to left movement, and is moving to the new metal powder layer that to start at formation cylinder 16 surface uniform laying depths behind formation cylinder 16 surfaces be T.Two-way powder laying device 30 moves sometime after t, high energy beam sweep generator is from two-way powder laying device 30 upper right side, start along paving powder direction with same speed at the uniform velocity to left movement, and drive effective processing overlay area of high energy beam sweep generator in the lump to left movement, until effective processing overlay area 26 right side boundary of high energy beam sweep generator stop after just overlapping with moulding cylinder 16 right side boundary.Now, two-way powder laying device 30 is positioned in 26 left sides, effective processing overlay area, is independent of each other to ensure that powder bed is laid with high energy beam scanning process.High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the powder bed of 26 inside, overlay area;
(8) afterwards, two-way powder laying device 30 continues according to aforementioned manner with high energy beam sweep generator, do step distance with same speed left along paving powder direction and equal an effectively step motion of processing overlay area 26 diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the powder bed of 26 inside, overlay area, until complete the scanning of all graph datas of current machined layer;
(9) motion of high energy beam sweep generator stops, and two-way powder laying device 30 continues along paving powder direction to left movement, and may send into the first Powder Recovery cylinder 7 by remaining metal dust.The forming board 14 decline distance identical with deposit thickness T;
(10) repeating step (1)~(9), until complete the Quick-forming of metallic element.
The foregoing is only preferred embodiments of the present invention, but the present invention should not be confined to the disclosed content of above-mentioned example and accompanying drawing.Every do not depart under spirit disclosed in this invention, complete equivalence or amendment, within must being considered as protection domain of the present invention.

Claims (10)

1. high energy beam increases an equipment for material manufacture large scale metallic element, it is characterized in that, this equipment comprises working chamber (9), workbench, control system (10) and gas purification module (11);
Described workbench comprises the first Powder Recovery cylinder (7), the second Powder Recovery cylinder (8) and formation cylinder (16), the first Powder Recovery cylinder (7) lays respectively at formation cylinder (16) both sides with the second Powder Recovery cylinder (8), and be all positioned at working chamber (9), the coplanar formation working face of upper surface of the first Powder Recovery cylinder (7), the second Powder Recovery cylinder (8) and formation cylinder (16); Gas purification module (11) is by air inlet and gas outlet and working chamber (9) formation closed circulation;
This equipment also comprises high energy beam sweep generator, the first powder storage hopper (3), the second powder storage hopper (4) and Powder spreader, and control system (10) is connected and controls their collaborative works with high energy beam sweep generator, the first powder storage hopper (3), the second powder storage hopper (4), Powder spreader, workbench and gas cleaning module (11) respectively;
High energy beam sweep generator is positioned at working chamber (9) top, and the first powder storage hopper (3), the second powder storage hopper (4) and Powder spreader are positioned at working chamber (9) inside; The first powder storage hopper (3), the second powder storage hopper (4) lay respectively at the both sides of high energy beam sweep generator, Powder spreader is positioned at the below of the first powder storage hopper (3) and the second powder storage hopper (4), to receive it for powder, and for carrying out two-way powder laying on formation cylinder (16) surface;
Described workbench, high energy beam sweep generator, the first powder storage hopper (3), the second powder storage hopper (4) and Powder spreader all can be provided with motion, make high energy beam sweep generator, Powder spreader can be synchronously and workbench occur along the relative motion of paving powder direction, and in high energy beam scanning process, the distance of high energy beam sweep generator center line and described Powder spreader keeps the radius of the effective processing overlay area (26) that is greater than high energy beam sweep generator.
2. high energy beam according to claim 1 increases the equipment of material manufacture large scale metallic element, it is characterized in that, described high energy beam sweep generator, the first powder storage hopper (3), the second powder storage hopper (4), Powder spreader are fixedly mounted on motion, jointly form powder feeding and scan module (1);
Powder spreader is made up of the first unidirectional Powder spreader (5) and the second unidirectional Powder spreader (6), the first powder storage hopper (3), the second powder storage hopper (4) distribute as reference is mirror image taking the center line of high energy beam sweep generator, the first unidirectional Powder spreader (5) and the second unidirectional Powder spreader (6) also distribute as reference is mirror image taking the center line of high energy beam sweep generator, and the first unidirectional Powder spreader (5) and the second unidirectional Powder spreader (6) lay respectively under the first powder storage hopper (3) and the second powder storage hopper (4).
3. high energy beam according to claim 1 increases the equipment of material manufacture large scale metallic element, it is characterized in that, described high energy beam sweep generator, the first powder storage hopper (3), the second powder storage hopper (4), Powder spreader are fixedly installed in working chamber (9) middle part, jointly form powder feeding and scan module (1); Wherein, the first powder storage hopper (3), the second powder storage hopper (4) distribute as reference is mirror image taking the center line of high energy beam sweep generator; Powder spreader is made up of the first unidirectional Powder spreader (5) and the second unidirectional Powder spreader (6), the first unidirectional Powder spreader (5) and the second unidirectional Powder spreader (6) lay respectively under the first powder storage hopper (3), the second powder storage hopper (4), and distribute as reference is mirror image taking the center line of high energy beam sweep generator;
Described workbench is arranged on table transmission mechanism (28).
4. high energy beam according to claim 1 increases the equipment of material manufacture large scale metallic element, it is characterized in that, Powder spreader is two-way powder laying device (30), the first powder storage hopper (3) and the second powder storage hopper (4) are separately fixed at working chamber (9) both sides, top, and high energy beam sweep generator and two-way powder laying device (30) are respectively equipped with motion.
5. increase the equipment of material manufacture large scale metallic element according to arbitrary described high energy beam in claim 1 to 4; it is characterized in that; described high energy beam is laser beam; described high energy beam sweep generator is scanning galvanometer group; scanning galvanometer group is by forming along row or multiple row galvanometer system perpendicular to the parallel placement of paving powder direction, and gas purification module (11) is inert protective gas environment for making working chamber (9) inner.
6. increase the equipment of material manufacture large scale metallic element according to arbitrary described high energy beam in claim 1 to 4, it is characterized in that, described high energy beam is electron beam, described high energy beam sweep generator is beam deflector group, beam deflector group is by forming along row or multiple row magnetic deflection system perpendicular to the parallel placement of paving powder direction, and it is vacuum environment that gas purification module is used for making working chamber (9) inner.
7. high energy beam according to claim 2 increases the control method of the equipment of material manufacture large scale metallic element, and its step comprises:
Powder feeding and scan module (1) are placed in working face upper left side by A1 step, and wherein the second unidirectional Powder spreader (6) lower end is placed between the first Powder Recovery cylinder (7) and formation cylinder (16); According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulating the single flow of the second powder storage hopper (4), is the disposable metal dust that meets the required weight of single berth powder that provides of the second unidirectional Powder spreader (6);
A2 step powder feeding and scan module (1) at the uniform velocity move right with a certain speed V along paving powder direction; The second unidirectional Powder spreader (6) moves to the metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T; Powder feeding and scan module (1) continue at the uniform velocity to move right with speed V along paving powder direction, and drive effective processing overlay area (26) of high energy beam sweep generator to move right in the lump, until planning scanning filling path enters inside, effective processing overlay area (26); Now, high energy beam sweep generator carries out selective melting deposition for new layer of metal powder (25);
A3 step powder feeding and scan module (1) continue at the uniform velocity to move right with speed V along paving powder direction, and by high energy beam, it are carried out to selective melting deposition in laying metal powder layer; Afterwards, powder feeding and scan module (1) sail out of formation cylinder (16) surface, and the laying of metal powder layer (25) and selective melting deposition finish;
A4 step powder feeding and scan module (1) continue at the uniform velocity to move right with speed V along paving powder direction, and the second unidirectional Powder spreader (6) may be sent into the second Powder Recovery cylinder (8) by remaining metal dust;
A5 step powder feeding and scan module (1) continue at the uniform velocity to move right with speed V along paving powder direction, until the first unidirectional Powder spreader (5) lower end moves between the second Powder Recovery cylinder (8) and formation cylinder (16); After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper (3), is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader (5); The distance that forming board (14) decline is identical with deposit thickness T;
A6 step powder feeding and scan module (1) along paving powder direction with speed V at the uniform velocity to left movement, the first unidirectional Powder spreader (5) moves to behind formation cylinder (16) surface, starts the new layer of metal powder that is T at formation cylinder (16) surface uniform laying depth; Powder feeding and scan module (1) continue along paving powder direction with speed V at the uniform velocity to left movement, and by high energy beam, it are carried out to selective melting deposition in laying new layer of metal powder; Afterwards, powder feeding and scan module (1) sail out of formation cylinder (16) surface, and new layer of metal powder is laid and selective melting deposition finishes; Powder feeding and scan module (1) continuation edge paving powder direction is with speed V at the uniform velocity to left movement, and the first unidirectional Powder spreader (5) may be sent into the first Powder Recovery cylinder (7) by remaining metal dust; Powder feeding and scan module (1) continue along paving powder direction with speed V at the uniform velocity to left movement, until the second unidirectional Powder spreader (6) lower end moves between the first Powder Recovery cylinder (7) and formation cylinder (16); The distance that forming board (14) decline is identical with deposit thickness T;
A7 step repeats A1 step the~the A6 step, until complete the final shaping of metallic element.
8. high energy beam according to claim 3 increases the control method of the equipment of material manufacture large scale metallic element, and its step comprises:
Moving bolster (27) is placed in powder feeding and scan module (1) lower right by B1 step, and wherein the second unidirectional Powder spreader (6) lower end should be positioned between the first Powder Recovery cylinder (7) and formation cylinder (16); According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulating the single flow of the second powder storage hopper (4), is the disposable metal dust that meets the required weight of single berth powder that provides of the second unidirectional Powder spreader (6);
B2 moved further formula workbench (27) along paving powder direction with a certain speed V at the uniform velocity to left movement, formation cylinder (16) moves to behind the second unidirectional Powder spreader (6) below, the metal powder layer that it is T at formation cylinder (16) surface uniform laying depth that the second unidirectional Powder spreader (6) starts; Moving bolster (27) continues along paving powder direction with speed V at the uniform velocity to left movement, effectively process inside, overlay area (26) until planning scanning filling path enters high energy beam sweep generator, now high energy beam sweep generator carries out selective melting deposition for the metal powder layer of having laid;
B3 moved further formula workbench (27) continues along paving powder direction with speed V at the uniform velocity to left movement, and by high energy beam, it is carried out to selective melting deposition in laying metal powder layer; Afterwards, formation cylinder (16) sails out of the second unidirectional Powder spreader (6) and high energy beam sweep generator below in succession, and metal powder layer is laid and selective melting deposition finishes;
B4 moved further formula workbench (27) continuation edge paving powder direction is with speed V at the uniform velocity to left movement, and the second unidirectional Powder spreader (6) may be sent into the second Powder Recovery cylinder (8) by remaining metal dust;
B5 moved further formula workbench (27) continues along paving powder direction with speed V at the uniform velocity to left movement, until the second Powder Recovery cylinder (8) and formation cylinder (16) lay respectively at the first unidirectional Powder spreader (5) both sides, lower end; After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper (3), is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader (5); The distance that forming board (14) decline is identical with deposit thickness T;
B6 moved further formula workbench (27) at the uniform velocity moves right with speed V along paving powder direction, formation cylinder (16) moves to behind the first unidirectional Powder spreader (5) below, the new metal powder layer that it is T at formation cylinder (16) surface uniform laying depth that the first unidirectional Powder spreader (5) starts; Moving bolster (27) continues at the uniform velocity to move right with speed V along paving powder direction, and by high energy beam, its selective melting is deposited in laying new layer of metal powder; Afterwards, formation cylinder (16) sails out of the first unidirectional Powder spreader (5) and high energy beam sweep generator below, and new layer of metal powder is laid and selective melting deposition finishes; Moving bolster (27) continues at the uniform velocity to move right with speed V along paving powder direction, and the first unidirectional Powder spreader (5) may be sent into the first Powder Recovery cylinder (7) by remaining metal dust; Moving bolster (27) continues at the uniform velocity to move right with speed V along paving powder direction, until the first Powder Recovery cylinder (7) and formation cylinder (16) lay respectively at the second unidirectional Powder spreader (6) both sides, lower end; The distance that forming board (14) decline is identical with deposit thickness T;
B7 step repeating step B1 step the~the B6 step, until complete the Quick-forming of metallic element.
9. high energy beam according to claim 4 increases the control method of the equipment of material manufacture large scale metallic element, and its step comprises:
Two-way powder laying device (30) is placed in the first powder storage hopper (3) below by C1 step, according to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper (3), is the disposable metal dust that meets the required weight of single berth powder that provides of two-way powder laying device (30);
C1 step two-way powder laying device (30) at the uniform velocity moves right with a certain speed V along paving powder direction, moves to the metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T; Two-way powder laying device (30) moves sometime after t, and high energy beam sweep generator, from two-way powder laying device (30) upper left side, starts at the uniform velocity to move right along paving powder direction with same speed V; Two-way powder laying device (30) continues to move right with speed V along paving powder direction with high energy beam sweep generator, and drive effective processing overlay area (26) of high energy beam sweep generator to move right in the lump, until planning scanning filling path enters inside, effective processing overlay area (26), now high energy beam sweep generator carries out selective melting deposition for metal powder layer (25);
C3 step two-way powder laying device (30) continues at the uniform velocity to move right with speed V along paving powder direction with high energy beam sweep generator, and by high energy beam, its selective melting is deposited in laying metal powder layer (25); Afterwards, two-way powder laying device (30) sails out of formation cylinder (16) surface in succession with high energy beam sweep generator, and the laying of metal powder layer (25) and selective melting deposition finish;
The motion of C4 step high energy beam sweep generator stops, and two-way powder laying device (30) continues at the uniform velocity to move right with speed V along paving powder direction, and may send into the second Powder Recovery cylinder (8) by remaining metal dust;
C5 step two-way powder laying device (30) moves to the second powder storage hopper (4) below along paving powder direction at the uniform velocity left with speed V, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the second powder storage hopper (4), is the disposable metal dust that meets the required weight of single berth powder that provides of two-way powder laying device (30); The distance that forming board (14) decline is identical with deposit thickness T;
C6 step two-way powder laying device (30) along paving powder direction with speed V at the uniform velocity to left movement, and moving to the new metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T; After two-way powder laying device (30) motion sometime, high energy beam sweep generator is from two-way powder laying device (30) upper right side, start along paving powder direction with same speed V at the uniform velocity to left movement, and when two-way powder laying device (30) is laid new layer of metal powder to its selective melting deposition; Afterwards, two-way powder laying device (30) sails out of formation cylinder (16) surface in succession with high energy beam sweep generator, and new layer of metal powder is laid and selective melting deposition finishes; High energy beam sweep generator motion stops, and two-way powder laying device (30) continues along paving powder direction with speed V at the uniform velocity to left movement, and may send into the first Powder Recovery cylinder (7) by remaining metal dust; The distance that forming board (14) decline is identical with deposit thickness T;
C7 step repeats C1 step the~the C6 step, until complete the Quick-forming of metallic element;
Or adopt following step:
Two-way powder laying device (30) is placed in the first powder storage hopper (3) below by E1 step, according to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper (3), is the disposable metal dust that meets the required weight of single berth powder that provides of two-way powder laying device (30);
E2 step two-way powder laying device (30) at the uniform velocity moves right along paving powder direction, moves to the metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T; Two-way powder laying device (30) moves sometime after t, high energy beam sweep generator is from two-way powder laying device (30) upper left side, start to move right along paving powder direction with same speed, and drive effective processing overlay area (26) of high energy beam sweep generator to move right in the lump; After effective processing overlay area (26) left border overlaps with moulding cylinder (16) left border just, two-way powder laying device (30) stops with the motion of high energy beam sweep generator; Two-way powder laying device (30) is positioned at right side, effective processing overlay area (26), is independent of each other to ensure that powder bed is laid with high energy beam scanning process; High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26);
After the inner powder bed in E3 step effective processing overlay area (26) has scanned, two-way powder laying device (30) and high energy beam sweep generator continue to stop after paving powder direction moves right a distance that is equivalent to effectively to process overlay area (26) diameter D with same speed, high energy beam sweep generator is again according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26);
After E4 step, two-way powder laying device (30) and high energy beam sweep generator are according to aforementioned manner, continue to do step distance to the right along paving powder direction with same speed and equal an effectively step motion of processing overlay area (26) diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the inner powder bed in overlay area (26), until complete the scanning of all graph datas of current machined layer;
The motion of E5 step high energy beam sweep generator stops, and two-way powder laying device (30) continues to move right along paving powder direction, and may send into the second Powder Recovery cylinder (8) by remaining metal dust;
E6 step two-way powder laying device (30) moves to the second powder storage hopper (4) below left along paving powder direction, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the second powder storage hopper (4), is the disposable metal dust that meets the required weight of single berth powder that provides of two-way powder laying device (30); The distance that forming board (14) decline is identical with deposit thickness T;
E7 step two-way powder laying device (30) at the uniform velocity to left movement, and is moving to the new metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T along paving powder direction; Two-way powder laying device (30) moves sometime after t, high energy beam sweep generator is from two-way powder laying device (30) upper right side, start along paving powder direction with same speed at the uniform velocity to left movement, and drive effective processing overlay area of high energy beam sweep generator in the lump to left movement, until effective processing overlay area (26) right side boundary of high energy beam sweep generator stops after just overlapping with moulding cylinder (16) right side boundary; Now, two-way powder laying device (30) is positioned in left side, effective processing overlay area (26), is independent of each other to ensure that powder bed is laid with high energy beam scanning process; High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26);
After E8 step, two-way powder laying device (30) continues according to aforementioned manner with high energy beam sweep generator, do step distance with same speed left along paving powder direction and equal an effectively step motion of processing overlay area (26) diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the inner powder bed in overlay area (26), until complete the scanning of all graph datas of current machined layer;
The motion of E9 step high energy beam sweep generator stops, and two-way powder laying device (30) continues along paving powder direction to left movement, and may send into the first Powder Recovery cylinder (7) by remaining metal dust; The distance that forming board (14) decline is identical with deposit thickness T;
E10 step repeats E1 step the~the E9 step, until complete the Quick-forming of metallic element.
10. the control method that increases the equipment of material manufacture large scale metallic element according to the high energy beam described in claim 2 or 3, its step comprises:
Powder feeding and scan module (1) are placed in working face upper left side by D1 step, and wherein the second unidirectional Powder spreader (6) lower end is placed between the first Powder Recovery cylinder (7) and formation cylinder (16); According to the required precision of part, design increases individual layer powder thickness increment T in manufacture process process, regulating the single flow of the second powder storage hopper (4), is that the second unidirectional Powder spreader (6) provides the metal dust that meets the required weight of single berth powder;
D2 step powder feeding and scan module (1) move right along the relative working face of paving powder direction; The second unidirectional Powder spreader (6) relative motion is to metal powder layer that to start at formation cylinder (16) surface uniform laying depth behind formation cylinder (16) surface be T; Powder feeding and scan module (1) continue to move right along the relative working face of paving powder direction, and drive effective processing overlay area relative motion to the right in the lump of high energy beam sweep generator, stop until effectively processing after overlay area (26) enters formation cylinder (16) top completely.High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26); ;
After the inner powder bed in D3 step effective processing overlay area (26) has scanned, powder feeding and scan module (1) move right along the relative working face of paving powder direction again, and the effective processing overlay area (26) that drives high energy beam sweep generator stops after the relative working face of paving powder direction moves right a distance that is equivalent to effectively to process overlay area (26) diameter, high energy beam sweep generator is again according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26);
After D4 step, powder feeding and scan module (1) are according to aforementioned manner, continue to do step distance to the right along the relative working face of paving powder direction and equal an effectively step motion for processing overlay area (26) diameter, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the inner powder bed in overlay area (26), until complete the scanning of all graph datas of current machined layer; Powder feeding and scan module (1) continue to move right along the relative working face of paving powder direction, and the second unidirectional Powder spreader (6) may be sent into the second Powder Recovery cylinder (8) by remaining metal dust;
D5 step powder feeding and scan module (1) continue to move right along the relative working face of paving powder direction, until the first unidirectional Powder spreader (5) lower end moves between the second Powder Recovery cylinder (8) and formation cylinder (16); After this, according to increasing individual layer powder thickness increment T in manufacture process process, regulating the single flow of the first powder storage hopper (3), is the disposable metal dust that meets the required weight of single berth powder that provides of the first unidirectional Powder spreader (5); The distance that forming board (14) decline is identical with deposit thickness T;
D6 step powder feeding and scan module (1) are along the relative working face of paving powder direction to left movement; The first unidirectional Powder spreader (5) moves to behind formation cylinder (16) surface, starts the new layer of metal powder that is T at formation cylinder (16) surface uniform laying depth; Powder feeding and scan module (1) continue along the relative working face of paving powder direction to left movement, and drive effective processing overlay area (26) relative motion left in the lump of high energy beam sweep generator, until effective processing overlay area (26) right side boundary of high energy beam sweep generator stops after just overlapping with moulding cylinder (16) right side boundary, the first unidirectional Powder spreader (5), the second unidirectional Powder spreader (6) are still symmetrically distributed in both sides, effective processing overlay area (26), are independent of each other to ensure that powder bed is laid with high energy beam scanning process; High energy beam sweep generator is according to the control system graph data providing of cutting into slices, and selective scanning is effectively processed the inner powder bed in overlay area (26);
D7 step powder feeding and scan module (1) continue to do step distance left along the relative working face of paving powder direction and equal an effectively step motion of processing overlay area (26) diameter D, after step distance of every motion, high energy beam sweep generator is according to the control system graph data providing of cutting into slices, selective scanning is effectively processed the inner powder bed in overlay area (26), until complete the scanning of all graph datas of current machined layer; Then, powder feeding and scan module (1) continue along the relative working face of paving powder direction to left movement, and the first unidirectional Powder spreader (5) may be sent into the first Powder Recovery cylinder (7) by remaining metal dust; Powder feeding and scan module (1) continue along the relative working face of paving powder direction to left movement, until the second unidirectional Powder spreader (6) lower end moves between the first Powder Recovery cylinder (7) and formation cylinder (16); The distance that forming board (14) decline is identical with deposit thickness T;
D8 step repeats D1 step the~the D7 step, until complete the final shaping of metallic element.
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